磷铁营养对大豆种子铁和植酸积累的影响

Effects of Iron and Phosphorus Nutrition on the Contents of Iron and Phytic Acid in Soybean Seeds

以铁含量低的周97(Z97)和铁含量高的科丰36(K36)为材料,研究了不同磷铁营养对大豆种子中铁与植酸积累的影响以及植酸与蛋白质的关系。结果表明:不同磷处理极显著地影响种子中植酸与铁的积累,品种间存在一定差异;不同铁处理对种子中铁含量的影响趋势相似,K36受影响的程度明显大于Z97;种子中植酸与铁、植酸与蛋白质均无显著相关性;限制种子中铁积累的主要环节是铁从根向豆荚的运输以及豆荚向种子的转运,并且品种间的遗传差异可以影响铁从豆荚向种子的转运。

Two soybean cultivars,Z97（low iron content） and K36（high iron content）,were selected as materials to study the effect of different phosphorus and iron nutrition on the contents of iron and phytic acid as well as the relationships between phytic acid and protein in seeds.The results showed that different phosphorus nutrition had a quite significant affection on the accumulation of phytic acid and iron contents in soybean seeds and the affection extent was different between the two cultivars,and the response trend of the two cultivars to the different iron nutrition level was similar,however,the affection content of K36 was greater than that of Z97.Besides,it was observed that phytic acid content was not correlated with protein and iron accumulation in soybean seeds.In conclusion,it was proved that the main limit factor of iron accumulation were the transport of iron from roots to soybean pods and the translocation from pods to seeds,and the genetic variation of soybean germplasm had a significant affection on the translocation of iron from pods to seeds.